I've been trying to get the Windows 8.1 Update 1 to install for a couple hours now. I installed a series of files using windows update earlier in the day. Later I tried installing the update file (KB2919355) that popped up in the Windows Update window.
The downloading process look over 45 minutes for a 800 MB file even thought I have an internet connection over 20 MB/s. After that it spent 20 minutes installing the update until it failed giving an error code of 80070020. From that I restarted the computer
to see if I could try another stab at it, nothing changed or improved.

Now I looked in the Windows update history to see if the other required updates like KB2919442,KB2932046, KB2937592 andKB2938439 were installed and they aren't in the update history. I thought they were installed already for KB2919355 to be installed. Are all of these update files included
in the KF2919355 update that pops up in the windows update?

Also, my update history can is only up to date in the control panel and doesn't show any updates installed in the modern PC settings app. Did windows update fail to properly install updates required before trying to install later updates? What can and can't
I install right now?

So far I've manually downloaded the links to KB2919355, KB2919442,KB2932046, KB2937592 andKB2938439
posted in this thread:

Question Info

(Update (5/5/14): A fix for KB2919355 has been released that will resolve some customers receiving Error 80073712 when installing this
update. This fix is now included as part of KB2919355 and will install the next time you attempt to install Windows Updates.The troubleshooting steps listed below have been revised to include this additional fix.

Be sure to read through the Install Instructions on the download page.
The downloaded files must be installed in the proper order, starting with clearcompressionflag.exe, which was recently added to help prevent Error 80073712 from occurring in some cases.